Belt-and-pulley gearing.



Patented Feb. 25,1902.

L. J. 0. SOUHAMI BELT AND PULLEY GEAFHNG.

(Application filed July 22, 1901.)

(No Model.)

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UNITED STATES PATENT FFICE.

LEONARD JOSEPH COPPING SOUHAMI, OF LGNDON, ENGLAND.

BELT AND-PULLEY GEARING.

SPECIFICATION forming part of Letters Patent No. 694,21 1, datedFebruary 25, 1902.

Application filed July 22,1901.

London, England, have invented certain new and useful Improvements inand Relating to Belt-and-Pulley Gearing; and I do hereby declare thefollowing to be a full, clear, and ex act description of the invention,such as will to enable others skilled in the art to which it 2o ference.

appertains to make and use the same.

This invention relates to belt-and-pulley gearing, and is designed toprovide a means of throwing the driven shaft into and out of actionwithout the use of the ordinary fast and loose pulleys.

The device consists, essentially, of a pulley keyed onto the drivenshaft, such pulley being provided with rollers around its circum- Theserollers are mounted above recesses cut in the-pulley and are pressedoutward by means of springs. Immediately above the belt which drives thepulley I so mount a jockey-pulley that it may be lowered when desired inorder to press against the belt and take up the. slack. By this meansthe belt is tightened round the driven pulley, forcing the rollers intothe recesses,and thus enabling the belt to grip the pulley.

In order that my said invention may be clearly understood, I willdescribe the same with reference to the drawing accompanying thisspecification, in which- Figure 1 is an elevation of the gear in itsfree state. Fig. 2 is an elevation showing the driven pulley fast. Fig.3is a section on a larger scale, showing a roller on ballbearings.

The same letters of reference are employed to denote the same parts inall the views.

a. shows the driving, and b the driven, pulley; 0, the belt.

=cZ shows a jockey-pulley turning freely and "carried by a fork e. fis alever having. its

fulcrum at g. The lower end h of the fork e is pivoted to the lever f.

2' shows a cylinder in which works a piston .5 the rod of which ispivoted to the extremity m of the lever f. The cylinder 2' rocks inbearings 01.. Y

0 isa spring.

Rollers p are mounted in recesses in the which figure q Serial No.69,308. (No model.)

bin the manner shown at Fig. 3, in shows a metal framework (See pulleywhich fits in the recess in the pulley. also Figs. 1 and 2.)

r r are two pins passing through holes, one at each end of the spindles,which carries the roller p on ball-bearin gs p.

shows springs.

u it show bands passing around the pulley to hold the metal frames (1 inplace in the re- 'cesses.

The operation of the disconnectinggear is as follows: IVhen thejockey-pulley d is in the position shown at Fig. 1, the rollers 19project above the surface of the pulley I), being forced outward by thesprings t. Consequently when the pulley ais turning the belt 0 simplyturns the rollers 19 without moving the pulley b,- but when air underpresh sure is admitted to the top of the piston j in the cylinder 11 thepiston descends (overcom ing the spring 0) and the lever f is turnedinto the position shown at Fig. 2, bringing the jockey-pulley bdown,'and thus tightening the belt 0. In consequence of this tighteningthe rollers 13 when they touch the belt are forced into the recesses inthe pulley b, so that the belt then grips the surface of and drives thepulley b.

While-I have shown one particular method of mounting the rollers uponthe face of the pulley, it will be understood that I do not limit myselfto theconstruction shown, the number of rollers employed and the methodof mounting the same being adapted to vary according to differentrequirements.

Anyother suitable means for actuating the jockey-pulley may be used inplace of those shown.

What I claim, and desire to secure by Letters Patent, is-

1. In a device of'the character described, the combination with a pairof pulleys, a belt passing over said pulleys, and a plurality ofrollers'resiliently set in the face of one of said pulleys; of ajockey-pulley adapted to apply lOO tension upon said belt, substantiallyas described.

3. In a device of the character described, the combination Wit-h a pairof pulleys, a belt 5 passing over said pulleys, and a plurality ofrollers resiliently journaled in the face of one of said pulleys; of ajockey-pulley, and fiuid-pressure mechanism for actuating saidjockey-pulley to apply tension upon said belt,

substantially as described.

of said pulleys; of a jockey-pulley, apivoted lever in connection withsaid jockey-pulley, and means for actuating said lever, substantially asdescribed.

5. In a device of the character described,

the combination with a pair of pulleys, abelt passing over said pulleys,and a plurality of rollers resilientlyjournaled in the face of one ofsaid pulleys; of a jockey-pulley, a pivoted lever in connection withsaid jockey-pulley, a piston connected to the free end of said lever,and a fluid pressure cylinder Within which said piston reciprocates, foractuating said lever, substantially as described.

6. In a device of the character described, the combination with abelt-pulley; of a plurality of rollers yieldingly journaled in the faceof said pulley, substantially as described. 7. In a device of thecharacter described, the combination with a belt-pulley; of a pluralityof rollers journaled in the face thereof, and springs beneath saidrollers, adapted to force the same above the surface of said pulley,substantially as described.

In testimony whereof I affix my signature in presence of two witnesses.

LEONARD JOSEPH COPYING SOUHAMI.

Witnesses:

ADOLPH EDWARD VIDAL, HERBERT ARTHUR MARSHALL.

